301 Redirects After Web Service Closure are Good for SEO

Made CodeNote.net Multilingual

During the three-day weekend, I implemented multilingual support for CodeNote.net that I had wanted to work on for a while. This is the first phase where I added English support, and I've summarized the specific steps from URL design to hreflang configuration, which is important for SEO.

Don't Use CSS Text Truncation with Ellipses (...) for SEO

Introducing why we avoid CSS text truncation with ellipses, as it may lead to SEO penalties.

Google Search Guidance for AI-Generated Content and Author Markup Policy

Achieved Perfect 100 Scores on All PageSpeed Insights Metrics

Should Allow Come Before Disallow in robots.txt? RFC and Compatibility Best Practices

The claim that 'Allow must be written first in robots.txt or it won't work.' While this is technically incorrect according to the latest RFC, it's a best practice that can't be ignored for compatibility reasons. This article explains why, based on RFC 9309 and older crawler behavior.

URL Normalization for Astro Sites: Why and How to Always Enable Trailing Slash

Should you add a slash / at the end of website URLs or not? This is one of the important themes when considering SEO. For CodeNote.net, I reviewed the Astro configuration and decided to always enable trailing slash. I'll share the reasons and specific configuration methods.

Updated robots.txt Based on Content Signals to Open All Content for AI Training

I want to provide my content as context for AI, and I find it advantageous for AI training purposes. For these reasons, I have made all content on this site, codenote.net, available for search engines, AI input, and AI training. This article introduces the robots.txt updates based on Content Signals policy and the background behind this decision.